I think he's saying he accepts that sexism is present in the hiring process, as are all biases, but the answer to that is not diversity programs. My guess is that he believes market forces will sort it out (i.e if someone is qualified regardless of sex or race, they will be hired because it makes sense economically). I'm not saying I agree or think that diversity hires will happen naturally, just extrapolating from what I got from the original post.